Yep you are right, I wanted to say when looking in the direction of travel! The correct term is anti clockwise sure.
Regarding the FCOM and the trim, what it says there is that the aircraft when flying should have (theoretically) zero rudder trim input. With this in mind, when it is trimmed, it should be at zero. Because the average value in cruise is about 0,5R and 0,8L, there is a small 0,2L residual
Now the true rudder trim deflection should stay between +/- 1,5 degrees, otherwise maintenance has to work again
So the acceptable values are between 2,3L (0,8+1,5) and 1R (1,5-0,5)
Those values has nothing to do with the indication. The point is that there may be a difference from the real trim value by some defined amount
This amount shows that for some reason, the aircraft is trimmed more to the left, always